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Патент USA US3021787

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Feb. 20, 1962
3,021,777
W. A. SMITH
GREASE EXTRACTING VENT WITH HEATING MEANS
2 Sheets-Sheet 1
Filed June 17, 1958
/2
/
William A. Smith
INVENTOR.
BY 2mm
nae/yaw
Feb. 20, 1962
3,021,777
w. A. SMITH
GREASE EXTRACTING VENT WITH HEATING MEANS
Filed June 17, 1958
2 Sheets-Sheet 2
William A; Smith
1N VENTOR.
BY Q4...“ 40%;“,
Mun/W zsr
1
2
3,021,777
The canopy ‘10 includes a back wall 18, end walls 20
and a partial top wall 22 having a downturned ?ange 24'
across the front portion thereof. The end wall 20 may
also be provided with inturned ?anges 21 and the ends of
the top wall 22 may have depending ?anges 23 engaged
with the end walls 20‘ and the bottom edges of the end
GREASE EXTRACTING VENT WITH
IEATING MEANS
William A. Smith, 2916% Elm St., Dallas 1, Tex.
Filed June 17, 1958, Ser. No. 742,571
3 Claims. (Cl. 98—115)
walls 20 may have inturned ?anges 25 for resting on
the top of the stove 12. The rear wall 18 of the canopy
porating heat for melting the grease extracted from the 10 has an inwardly bowed portion 26 forming a part of the
transition conduit 16 which de?nes an elongated gener
fumes created by a cook stove during the cooking proc
ally rectangular discharge opening 28 which extends
ess together with a construction incorporating a natural
completely across the upper portion of the canopy 10.
drainage for grease so that the same may be discharged
Secured to the rear wall 18 is a forwardly and upwardly
into a disposable receptacle;
extending bracket member 30 forming a support for a
An object of the present invention is to provide a grease
grease pan 32 and having an apron ba?le member 34
extracting vent with heating means and grease drainage
pivoted
to its outer edge by a suitable hinge means 36.
means that is an improvement over Patent No. 2,748,688,
The apron ba?ie member 34 is a generally vertical mem
granted June 5, 1956, for Grease Extracting Vent.
ber and is held in its vertical position by sliding latch
As in the above mentioned patent, other objects of the
members 38, each having a latch housing 40 and a handle
present invention reside in the extraction of grease from
42 for manipulating the latch member 38. The housing
fumes created by a cook stove for eliminating a serious
4t? is provided with a slot 44 for slidably receiving a shank
?re hazard and for easy disposal of such grease for main
of the handle 42 and the end walls 20 of the canopy 10
taining the cooking area in a clean and sanitary condition.
are provided with apertures 43 for receiving the outer
A further important feature of the present invention is
end portion of each of the latch members 38 when they
to provide a heating device mounted interiorly of the
are in their extended position for securing the apron
hollow drum forming part of the vent for melting the
baf?e member 34 in vertical position. The handle 42
grease thereon thus preventing deposit of grease on the
may be retracted thereby withdrawing the latch mem
exterior surface of the drum so that the melted grease
ber 38 from the apertured end walls 20 and permitting
will drop into a receptacle provided therefor together with
the apron ba?ie member 34 to be pivoted about hinge
a heating element on the undersurface of the receptacle
means 36 to an open position thereby providing access
for heating the grease therein and further providing a
to the interior of the canopy 10 and removal of the grease
drainage for the receptacle by lowering one end below
pan
32 for cleaning the interior of the canopy.
the other and providing a box-like drain on the lowered
As best shown in FIGURE 2, the lower edge of the
end of the canopy for draining the grease into a disposable
container so that the disposable container may be de 35 opening 28 is de?ned by a projecting book-shaped mem
ber 46 disposed in depending relation to the transition
posited into a garbage can or the like thus disposing of
conduit 16 with a cylindrical drum 48 supported there
the grease without any damage to a sewage system thus
from. The cylindrical drum 48 is provided with a sus
greatly reducing the ?re hazard in the ventilation system
pension plate 50 projecting from the periphery thereof
and also in the sewer system and further keeping these
The present invention generally relates to a grease ex
tracting vent and more particularly to such a vent incor
with the suspension plate 56 having a hook member 52
units clean and sanitary.
40
along the upper edge thereof for engaging over the hook
These together with other objects and advantages which
member 46 thereby removably suspending the drum 48
will become subsequently apparent reside in the details
within the con?nes of the canopy 10. The drum 48 is
suspended directly over the grease pan 32 and in spaced
panying drawings forming a part hereof, wherein like 45 relation to the rear wall 18 and the ba?le member 34 with
the suspension plate 5t) forming a closure from the top
numerals refer to like parts throughout, and in which:
wall 22 down to the drum 48 thus providing a positive
FIGURE 1 is a perspective View showing the grease
path of movement for the grease laden fumes as illus
extracting vent of the present invention assembled over a
trated by the arrows in FIGURE 2 of the drawing. The
stove;
grease laden fumes will travel up over the apron ba?ie
FIGURE 2 is a vertical sectional View taken substan
member and then downwardly about the periphery of the
tially on a plane passing along section line 2-2 of FIG
drum 48 for deposit of the grease on the drum so that the
URE 1 of the grease extracting vent illustrating the de
same will drip oif into the pan 32. For further support
tails of construction thereof;
of the drum, a pair of angle brackets 54 are secured on
FIGURE 3 is a longitudinal sectional view taken sub
55 the end walls 20 for supporting the lower periphery of
of construction and operation as more fully hereinafter
described and claimed, reference being had to the accom
stantially upon a plane passing along section line 3—3 of
FIGURE 2 illustrating further structural details of the
grease extracting vent;
the drum in the desired position. By lowering the apron
baffle member 34 the drum 48 may be removed by dis
engaging the hook members 46 and 52 for cleaning as may
FIGURE 4 is a perspective view of the drum with por
become necessary. All of the elements 30, 32, 34, 46, 48,
tions broken away for illustrating the orientation of the
50 and 52 extend throughout the entire length of the
heating element in the drum; and
canopy and are engaged with both end walls 24}.
FIGURE 5 is a detailed elevation with portions broken
Supported interiorly of the cylindrical drum 43 is a
away showing the latch mechanism for the movable part
heating element in the form of an elongated heating tape
of the ba?ie.
or strip heater 56 provided with a female plug 58 at one
Referring now speci?cally to the drawings, the grease
end supported by a bracket 66. The female plug 58
extracting vent of the present invention includes a canopy 65 is aligned with an opening in the end wall for receiving
generally designated by the numeral 10 which is ?tted
over the upper edge of a stove 12 and is provided with a
discharge conduit 14 and a transition conduit 16 between
a male plug connected with a suitable source of elec
trical energy for heating the bottom peripheral portion
of the drum 48 so that any grease thereon will be melted
the canopy 10 and the discharge conduit 14. The dis
and will drip into the grease pan 32.
charge conduit 14 is provided with a suitable discharge 70 The grease pan 32 is providedwith a heating tape or
fan (not shown) located therein for pulling the grease
strip heater element 62 on the lower surface thereof which
laden fumes through the grease extracting vent.
is provided with a female plug 64 on one end thereof sup
3,021,777
3
4
ported by a bracket 66 which supports the female plug in
ing strips eliminates the necessity of removing the drum
and trough for cleaning.
alignment with a male plug 68 for connection with a suit
able source of electrical energy for energizing the heating
element 62 thus melting the grease in the grease pan.
Disposed on the back wall 18 and inwardly of member
39 are supporting brackets 79 for the grease pan 32 which
support the grease pan with one end at a higher eleva‘
The foregoing is considered as illustrative only of the
principles of the invention. Further, since numerous
modi?cations and changes will readily occur to those
skilled in the art, it is not desired to limit the invention
to the exact construction and operation shown and de
tion than the other. The end of the grease pan having
scribed, and accordingly, all suitable modi?cations and
the lowest elevation is in alignment with an opening in
equivalents may be resorted to, falling within the scope of
the end wall and communicates with a nipple 73 extend~ 10 the invention as claimed.
ing into the interior of a box-like member 72 having a
What is claimed as new is as follows:
bottom drain pipe or nipple 74 connected therewith and
1. In combination with a grease extracting vent in
having a pivotal lid or inspection cover 76 on the top
cluding an enlarged generally rectangular canopy for col
thereof which forms an inspection box so that the interior
lecting grease laden fumes, a discharge conduit extending
of the box-like member 72 may be inspected and the 15 from the upper end of the canopy for venting the canopy
drain pipe 74 may be inspected. The drain pipe 74 is
to the atmosphere, a vertical plate extending into the in
communicated with a suitable conduit for leading the
terior of the canopy and forming a continuation of the
melted grease downwardly into a disposable container,
front side of said discharge conduit, a bracket on each
such as a plastic bag, which may be disposed in an out
side wall of the canopy, a cylindrical drum supported
of-the-way position so that the grease is drained into the 20 from said plate and said brackets, said drum and vertical
plastic bag and the plastic bag or other suitable dispos
plate extending horizontally and completely across the
able container may then be removed and disposed of in
over the stove 12 and the exhaust fan pulls the grease
laden fumes from over the stove out through the dis
charge conduit 14. As the grease laden fumes pass up
over the apron battle member 34, they' are de?ected
interior of the canopy thereby forming a fume barrier, a
baffle extending across said canopy and extending to the
rear wall of the canopy in spaced relation to the drum
and plate and being disposed between the drum and a
source of fumes located forwardly of the drum, said
ba?le terminating in spaced relation to the top of the
canopy and above the lower periphery of the drum and
downwardly about the outer periphery of the drum 48
and then upwardly through the opening 28 to the dis
outwardly of the drum and plate, said discharge conduit
being disposed on the opposite side of the drum from the
charge conduit 14. The grease fumes due to the centri
fugal action as they pass about the drum 48 and due to
the change of direction as they pass about the apron
ba?le member 34 deposit the grease therein on the sur
upper end of the ba?le and downwardly around the drum
a suitable manner such as by deposit in a garbage can.
In operation of the device, the canopy 10 is installed
faces of the drum, the apron ba?le member, the rear wall
and the grease pan with all of these services being tapered
baffle whereby grease laden fumes must pass over the
and upwardly through the discharge conduit for extract
ing grease from the fumes by centrifugal force as they
pass around the lower periphery of the drum, an electric
to drain the grease into the grease pan 32,. The heat ele
heating element connected with a source of electrical en
ergy mounted on the inner surface of the bottom of the
ment in the drum assures that no grease or substantially
no grease will be accumulated on the drum for eliminat
drum for melting grease deposited on the surface of the
drum for preventing an accumulation of grease thereon,
ing a ?re hazard and maintaining the drum in a clean 40 means underlying the drum for receiving melted drippings
condition and the heating element under the grease pan
therefrom.
assures that the grease in the pan will be melted so that
2. In combination with a grease extracting vent in
the same may drain by gravity out through the end wall
cluding an enlarged generally rectangular canopy for col
thereof and out through a nipple 73 into the box-like
lecting grease laden fumes, a discharge conduit extending
member 72 for discharge through the drain pipe 74 into 45 from the upper end of the canopy for venting the canopy
a disposable container or receptacle, thus assuring that
to the atmosphere, a vertical plate extending into the in
there will be no collection of grease in the device thus
terior of the canopy and forming a continuation of the
completely eliminating a ?re hazard and maintaining the
front side of said discharge conduit, a bracket on each
device in a clean condition at all times. The device may
side wall of the canopy, a cylindrical drum supported
be constructed of any suitable material such as stainless
from said plate and said brackets, said drum and vertical
steel or the like which will meet the sanitation require
' plate extending horizontally and completely across the
ments as well as appearance requirements of a device of
interior of the canopy thereby forming a fume barrier,
at baffle extending across said canopy and extending to
this nature.
With the previously described structure, the main ob
the rear wall of the canopy in spaced relation to the drum
ject is readily accomplished, that is, the provision of self 55 and plate and being located between the drum and a
cleaning ventilator thereby removing the biggest danger
of tire by preventing the accumulation of grease thereon.
The heating elements may be energized at night or when
he stove is idle by any suitable time switch (not shown)
source of fumes disposed forwardly of the drum, said
ba?le terminating in spaced relation to the top of the
canopy and above the lower periphery of the drum and
outwardly of the drum and plate, said discharge conduit
being disposed on the opposite side of the drum from
thus requiring no operator or attention. The heating ele
the baflie whereby grease laden fumes must pass over
ments are energized for a short time only‘ and preferably
the upper end of the ba?le and downwardly around the
one hour or less daily for melting the grease that collects
drum and upwardly through the discharge conduit for
on the cylinder and in the grease trough or gutter. The
extracting grease from the fumes by centrifugal force as
heating strips are of a wattage to insure temperature of
65 they pass around the lower periphery of the drum, said
approximately 120° F. on the surface of the cylindrical
baffle having a lower section rigidly attached to the canopy
drum and grease trough and the trough is constructed so
and extending under the drum, a receptacle disposed on
that melted grease will flow by gravity into the lock-in
the lower section of the baffle, said receptacle being posi
box 72. The drain line from the nipple 74 should be ad
tioned under said drum for collecting grease from the
jacent the stove and constructed of smooth pipe or tub— 70 fumes, said receptaclebeing mounted with one end at a
ing. The look-in box v"l2 is large enough to permit man
lower elevation than the other, and means communicated
with the lower end of the receptacle for draining grease
ual insertion of and removal ‘of a threaded nipple 73 hav
ing a knurled hand grip portion and this nipple extends
therefrom, said last named means including a hollow box
llike member mounted exteriorly of the canopy and com
into the end’ of the grease trough which will permit re
moval of the trough although the-provision of the heat 75 municated with the interior of the" receptacle, said member
3,021,777
5
having a drain pipe in the bottom for connection with a
disposable container, and a pivotal lid for providing
access to the interior of the box-like member for inspec
tion and cleaning thereof, and an electric heating element
connected with a source of electrical energy and mounted
on the undersurface of the bottom of the receptacle for
melting grease in the receptacle.
3. The combination of claim 2 together with an elec
tric heating element connected with a source of electrical
energy and mounted on the inner surface of the bottom 10
of the drum for melting grease deposited on the surface
of the drum for preventing an accumulation of grease
thereon.
6
References tilted in the ?le of this patent
UNITED STATES PATENTS
2,608,256
2,611,070
2,746,449
2,748,688
2,813,477
2,880,301
1952
1952
Pledger _____________ __ May 22, 1956
Smith ______________ __ June 5, 1956
Mathews ____________ __ Aug. 26,
Chandler ____________ __ Sept. 16,
Gaylord ____________ -_ Nov. 19,
Naxon ______________ _- Mar. 31,
1957
1959
FOREIGN PATENTS
370,160
Great Britain ________ __ Apr. 7,
1932